This is Perl module App::ExtractUsed.

INSTALLATION

App::ExtractUsed installation is straightforward. If your CPAN shell is set up,
you should just be able to do

    % cpan App::ExtractUsed

Download it, unpack it, then build it as per the usual:

    % perl Makefile.PL
    % make && make test

Then install it:

    % make install

DOCUMENTATION

App::ExtractUsed documentation is available as in POD. So you can do:

    % perldoc App::ExtractUsed

to read the documentation online with your favorite pager.

punytan